I got online today and saw a weird avatar on my account. I had never used an avatar before in this game. Every time I refreshed the page, a different avatar appeared. They were all monkey memes, and some of them were slightly inappropriate.

Not a bug, it's Eve's April fools prank XD

It's just Eve's April Fool's Prank. She does something for us every year. You can't change it back right now, but it will all go back to normal tomorrow.